﻿import java.util.Scanner;
public class Example2_3 {
	public static void main (String args[]) {
	System.out.println("请输入若干个数，每输入一个数回车确认");
			System.out.println("最后输入数字0结束输入操作");
		
	Scanner reader = new Scanner(System.in);
		
	double sum = 0;
		
	double x = reader.nextDouble();
		
	while(x!=0) {

		sum = sum+x;

		x = reader.nextDouble();

	}

	System.out.println("sum="+sum);
	
	}


}
